Can I stop a simulation run?

Yes, you can always stop a simulation run in the Plan window, in Monte Carlo, in the Sensitivity tools, Spider, Scenarios etc. by pressing the Cancel button. When you cancel a simulation run all results generated so far are lost.

You can also stop the application at any time by pressing Ctrl + Break or Ctrl + Pause. A window with the following message will appear: "Keyboard interrupt. Do you want to stop the current process?". If you answer No the process will go on. This is useful for checking that PetroVR is still working though not responding, or to cancel e.g. a window refresh that is taking too long.